Chickens teeth are almost as easy. Ebay for £40-50 was where i found mine.
If i retire the bike he can have them. Also have a 16 spoke 8spd rear wheel (tubs) if he's interested. Problem is from 8 spd campy change a lot of stuff for 9 spd. and it's not compatible. If he wants i have bar ends and rear mech for 9spd.